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March 20th-22nd Suppressed, Fish, Not Coming Threat


Rjay

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that convective flare up in the southeast and offshore yesterday evening is likely robbing moisture necessary for today’s “event”. there have been too many red flags to go with the bonkers totals spit out by some guidance yesterday. upper dynamics improve for the late afternoon and early evening but widespread 12”+ seems highly unlikely. 

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It sure is crazy that the models are split even this close to game time,,,I mean the exact track still very much in question and liquid amounts . If it is a long event and cold then snow will accumulate but where do the heavier bands setup and will it be moist or drier ? which models have it correct------cutback in moisture amounts on more than 1 model is concerning to me but I'm a novice

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15 minutes ago, purduewx80 said:

that convective flare up in the southeast and offshore yesterday evening is likely robbing moisture necessary for today’s “event”. there have been too many red flags to go with the bonkers totals spit out by some guidance yesterday. upper dynamics improve for the late afternoon and early evening but widespread 12”+ seems highly unlikely. 

8-12 is more likely with 12+ in banding.

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TWC just downgraded snowfall forecasts for the big cities; still has 8-12" for NNJ/NYC, but was 12-18" before.  Cantore said the inland low closed off and will rob the ocean low of moisture reducing precip (seen on almost every model last night including the Euro).  Bust potential is pretty high for Upton and somewhat high for Mt. Holly (vs. their lowered amounts), especially in spring with snow falling during the day - we really need good rates of 1" per hour to ensure we accumulate well (melting rate is at least 1/2" per hour this time of year); at least surface temps ought to cool to at or below 32F, reducing melting some vs. previous storms.  I hope I'm wrong, but that's what my gut tells me.  

Here's the fundamental problem in spring.  if you get 1" per hour rates for 10 hours, you'll likely get 8-9" of snow, since you'll overcome the melting rate quickly and accumulate rather easily with minimal melting, especially if air temps are below 32F.  But if you get 1/2" per hour rates for 10 hours, you probably end up a slushy inch on the ground, since the melting rate is so close to the snowfall rate the entire time.  

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I'm surprised that Upton is putting out such high totals for such a large area, a floor of 12 seems awfully high, it should be the ceiling.  The trend on all the models outside the NAM has been a less dynamic further east jackpot so I can understand why there's some concern about the higher totals. I'm debating about heading into work now, I guess I'll take the chance. 

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Usually I think the dry air is good cause it's drier snow and it's good that the ground is not even wet so it may evaporatively cool the column rather quick and start accumulating once it gets cranking, combined with wet numbing and eventually dynamic cooling. Every storm this month we had wet ground and warm ground to work with. I think the rates are going to be higher with this and this is why Upton is sticking to their guns I think

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Ok so I checked out both the 06z NAM and GFS.... looks to have the area in the .75-1.25” LE which extends as far north as parts of extreme Northern NJ and up to I84 then down through CT and into Long Island. So with that said the area looks good for a 5-12 inch snowfall with definitely isolated up to 15” in random spots. Guys that’s great for March 21st. Main action isn’t until early afternoon into the evening time. Stop the bickering and enjoy it!!

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